The crossover pipes cracking is a common occurrence. It is important that the muffler is properly supported. The purpose of those diaphragm springs is to keep the bolts tight during the heating/cooling that occurs there. Not to allow movement. When doing exhaust work, I like to use stainless hardware. make future removal much easier. Still need to never-seize to keep the threads from galling. Dennis -----Original Message----- From: Gary Thaxter <gthaxter@DGTDESIGN.COM> To: Vanagon@VANAGON.COM <Vanagon@VANAGON.COM> Date: Thursday, August 27, 1998 6:21 PM Subject: 86 syncro exhaust y-pipe bolts/washers?
>About 3 months ago I replaced the y-pipe. When I took the old one off, >there were no "bolts with a big washer and 5 diaphragm springs" (on either >side of the metal "donut" gasket) like it shows in the bentley. I never >thought it mattered, so I just replaced the regular ones that were on in >the first place. > >Now my rear crossover pipe is cracked off at the flange on the cylinder >head. I asked at the dealer about the spring and washer setup and they >said that parts were unavailable and that they weren't necessary anyway. > >I have a new crossover pipe I am about to put on, but I don't want it to >crack in a couple of months. > >Is the amount of play that the springs allow enough to cause stress that >will eventually break off my pipe? Should I worry or what should I use to >bolt it together? > >Thanks ahead >Gary Thaxter > >74 transporter panel >78 westy >85 kombi >86 syncro |
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